我国椴树科花粉形态的研究

 本文对分布于我国的椴树科(Tiliaceae)9属44种植物的花粉形态进行了光学显微镜   的系统观察，并对其中10种花粉的外壁细微结构进行了扫描电镜观察。本科花粉为长球形、   扁球形和球形，萌发孔为长3孔沟、短3孔沟和3(一4)孔三种类型，外壁主要为网状纹饰，个  别属为刺状纹饰。根据花粉资料，本文还探讨了该科植物分类中的某些问题。

Studies on Pollen Morphology in Tiliaceae of China

Pollen morphology of 44 species representing 9 genera of Tiliaceae in  China was examined under light microscope,  10 of them were observed with scanning electron microscope. Nine genera involved in this paper are:  Colona.  Corchoropsis, Corchorus, Excentrodendron, Grewia,  Hainannia,  Microcos,  Tilia and Triumfetta        The pollen grains  of  Tiliaceae  are  eurypalynous.  Based  on  the  aperture  type  and ornamentation,  they may be grouped into four types: (1)  The Grewia  type, pollen grains tricolporate:  Colona,  Corchorus, Grewia,  Microcos and  Triumfetta,  (2) The Tilia  type, pollen grains brevitricolporate: Hainania and Tilia, (3) The Corchoropsis type,  pollen grains triporate,  spinate: Corchoropsis,  and  (4) The Excentrodendron type, pollen grains triporate, reticulate: Exce ntrodendron. The significance of pollen morphology in taxonomy of Tiliaceae is discussed.  The palynological data seem to support the separation of Microcos from Grewia and the  transfer  of Corchoropsis to Sterculiaceae from Tiliaceae.